Sr Software Systems Engineer with Java

Location: Krakow, Małopolskie, Poland

Time Type: Full time

Job Description

Powering the agentic revolution in travel. Sabre is an AI-native technology leader, backed by one of the world’s largest travel data clouds. Built on an open, modular, cloud-native architecture, Sabre serves as the backbone for both established leaders and bold, new disruptors, guiding them to the next age of travel retailing through intelligent, connected, and personalized experiences. With AI at its core and operating at unparalleled scale, Sabre transforms insights into innovation, empowering airlines, hoteliers, agencies and other partners to retail, distribute and fulfill travel worldwide.

Why This Team?

At Sabre, we’re transforming the technology behind the global travel industry. As part of our Customer Identity & Access Solutions team, you’ll work at the heart of our core infrastructure—building critical microservices, modernizing cloud session state, and securing web applications used by millions.

Whether you're a Mid-Level looking to grow your system design skills and take on bigger technical challenges, or a Senior ready to drive architectural decisions and modernize enterprise security, this team offers the room, ownership, and intellectual challenges to elevate your career.

You’ll join a collaborative, highly skilled, and friendly team that values clean code, TDD, and engineering excellence over quick hacks.

What You’ll Do

• Build & Modernize: Design and develop scalable Java microservices and web applications powering core identity, authentication, authorization, and session state across Sabre's enterprise ecosystem.

• Elevate Engineering Standards: Practice Test-Driven Development (TDD), write clean, testable code, and lead/participate in constructive code reviews to maintain high quality.

• Own the Lifecycle: Drive feature delivery end-to-end—from initial design and automated testing to CI/CD pipelines, production deployment, and performance monitoring.

• Solve Scalability Challenges: Modernize legacy session management workflows into resilient, high-availability cloud-native architectures (GCP / Kubernetes).

• Collaborate & Mentor: Partner closely with product owners, security leads, site reliability engineers, and partner teams to refine requirements and share technical best practices across the team.

Tech Stack You'll Work With

• Core & Frameworks: Java 8 / 17, Spring Framework (Spring Boot, Spring MVC/Core)

• Cloud & Infrastructure: Google Cloud Platform (GCP), Kubernetes, Docker, Tomcat

• Data & Security: SQL (Oracle), LDAP, OAuth/OIDC, Modern Identity Protocols

• DevOps & Automation: Jenkins, GitHub Actions, Maven, Git, Bash

• Testing & Quality: JUnit, Mockito, Spock, Cucumber, TDD methodologies

What We’re Looking For

Whether you fit the Mid-Level or Senior track, we value a strong engineering foundation and a proactive mindset:

Core Requirements (Mid & Senior):

• Java Proficiency: Solid experience developing core Java applications and RESTful microservices.

• Spring Ecosystem: Practical hands-on experience with Spring Boot and Spring Frameworks.

• Testing & Quality First: Demonstrated experience with TDD, unit/integration testing (JUnit, Mockito, etc.), and automated CI/CD pipelines.

• Data & Tooling: Comfort working with relational databases (SQL) and basic shell scripting (Bash).

• Communication & Mindset: Fluent English (written & verbal), strong troubleshooting skills, and a self-driven approach to solving tricky problems.

• Education: Bachelor’s degree in Computer Science, Software Engineering, or equivalent practical experience.

What Makes You Stand Out for a Senior Role:

• Experience designing and scaling cloud-native microservices (preferably on GCP with Kubernetes).

• Hands-on expertise with identity and access management (IAM), session state handling, high volume and high throughput applications, or enterprise security frameworks.

• A track record of mentoring junior engineers, driving architectural discussions, and improving CI/CD and deployment strategies.

Ready to Shape the Future of Travel Tech?

If you're eager to solve complex engineering problems in a supportive, tech-forward environment, we’d love to connect! Apply today and let's build what's next together.

Work arrangements

• Hybrid working mode; 3 chosen days from the office in a week

• Flexible working hours: Maintain your work-life balance by adjusting your working hours to your needs

Paid time off

• Year-End-Break: enjoy additional fully paid days off during the last week of the year

• Paid parental leave: Take up to 12 weeks off with pay after birth or adoption of a child. Sabre Global Paid Parental Leave runs concurrently with local leave policies.

• Paid volunteer time: take up to 4 days annually to give your time to a charitable organization of your choice

Your money

• My Benefit platform/Multisport card: enjoy the benefit cafeteria system and use popular sport card

• Tax deduction: take the opportunity to claim deductible costs, reducing your income tax

• Employee Capital Plans: profit from long-term saving scheme co-financed by Sabre and the State Treasury

• Baby Bonus: benefit from one-time allowance on childbirth or adoption 

• Say Thanks program: collect points on recognition program and transfer them to wide variety of gifts and services

Health and wellness

• Luxmed VIP medical coverage: take care of yourself and your family with the extensive medical package with a broad range of additional services

• Foreign travel insurance: feel safe going abroad with free Allianz insurance offered as part of our Lux Med package

• Employee Assistance Program: find help in free, confidential program with a certified counselor

• Mindfulness & meditation apps: take care of your mental and physical health

• Life insurance: sign up for free, high coverage life insurance program

Career development

• Professional development: access to e-learning platforms as well as join Sabre live learning sessions

• Certification and tuition reimbursement

• Our Communities: join one of our team member groups focused on sharing knowledge and best practices (Google Developers Group, Innovation Lab Community, Women in Technology, SOLVE!T and many more)

And more

• Car and bike parking 

• Fun & Relax zone in modern office: enjoy electronic tables to work, foosball, ping pong, pool table, swings, massage chairs and terraces to admire a panoramic view of Kraków. We have parents’ rooms as well

• No dress code

• Innovation Lab: access Augmented Reality & Virtual Reality equipment, Robot construction kit, 3D printers and many more

• Attractive Referral Bonus: earn $2500 USD for every hired referral

We will give careful consideration to your application and review your details against the position criteria. You will receive separate notification as we progress your application.

Please note that only candidates who meet the minimum requirements will proceed in the selection process.

Sabre is an equal employment opportunity employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, national origin, sex, gender identity, sexual orientation, disability status, protected veteran status or any other characteristic protected by law.